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Description: 用于雷达数据处理的IDL程序文件，用于提取雷达的首波和末波，还可以去除地面反射点。可以预处理雷达回波数据，生成数字冠层模型。-Radar Data Processing for the IDL program file for the extraction of radar waves and at the end of the first wave, but also can remove the ground reflection point. Radar echo data can be pre-processing to generate a digital canopy model.
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Size: 4096 |
Author: 郭俊 |
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Description: 该程序是对在高分辨率和低擦地角的情况下，海面和地面的回波幅度服从对数正态分布的杂波进行仿真-The program is shining in the high-resolution and low angle, the surface and ground echo amplitude obey lognormal distribution of the clutter simulation
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Size: 1024 |
Author: zhen |
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Description: 高频地波雷达回波信号二维傅里叶变换仿真处理，通过该变换可以得到海上目标的速度和距离信息。-HF ground wave radar echo simulation of two-dimensional Fourier transform processing, the adoption of the sea can transform the speed and distance from goal information.
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Size: 1024 |
Author: 郝松 |
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Description: 使用维纳分布进行瞬时频率估计用来校正电离层非线性相位污染带来的频带展宽-High-frequency (HF) sky-wave radar
signals propagate to and from the target by means
of the ionosphere. The difficulty in obtaining very
narrow beamwidths at HF, and the long ranges
involved, mean that the signal backscattered from
the ground is often several orders of magnitude
greater than the target echo. To resolve the target,
coherent signal processing techniques are necessary,
detecting the target echo by virtue of the
Doppler shift caused by the target’s radial velocity.
Unfortunately, movement of the ionospheric
layer by which the radar signal has propagated
often causes the clutter spectrum and target to
spread in the frequency domain, rendering
extended coherent integration pointless. The
movement of the ionosphere can be regarded as
producing frequency modulation of the radar
signal, and thus if this modulation can be estimated
the radar signal may be corrected for the ionospheric
contamination. A technique using the
complex argument of the first-order mo
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Size: 615424 |
Author: sunrong |
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Description: 借助小波变换在时频分析上的优点，提取地面运动目标的回波信号特征在目标识别中加以运用-With wavelet transform in time-frequency analysis of the advantages of extracting ground moving target echo signal characteristics to be used in target recognition
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Size: 165888 |
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Description: 哈工大的高频地波雷达的仿真程序，可分别计算目标和海洋回波的功率谱密度，以及噪声。-HIT high-frequency ground wave radar simulation program can calculate the target and the power spectral density of sea echo, and noise.
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Size: 558080 |
Author: lilun |
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Description: 次程序用来仿真叠加了地杂波和高斯白噪声的回波信号-Second program is used to simulate the ground clutter superimposed Gaussian white noise and the echo signal
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Size: 1024 |
Author: 高晔钧 |
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Description: 。给出了时域滤波的基本原理以及通常采用的
IIR 椭圆地物杂波滤波器的设计方法。重点研究了回归滤波器这一时域滤波算
法。从正交多项式的拟合出发，给出了回归滤波器抑制地物杂波的基本原理及
其滤波实现过程。通过对回归滤波器的计算复杂度的研究，寻找使回归滤波器
计算量最小的正交多项式。分析了回归滤波器频率响应特性，比较了回归滤波
器与IIR 椭圆地物杂波滤波器的计算复杂度。利用仿真的雷达信号，分析了回
归滤波器的地物杂波抑制性能。回归滤波器实际上是一高通滤波器，它在滤掉
低频地物杂波的同时，对落在滤波器阻带内的天气回波信号同样会造成衰减。
在天气回波信号谱宽固定的情况下，通过改变天气回波信号的平均多普勒频率，
分析了回归滤波器对它的衰减情况。在基于一组实际采集的雷达信号的基础上，
给出了回归滤波器的地物杂波抑制比随着滤波器阶数的变化情况。-Firstly, this dissertation introduces the research background and significance of
ground clutter suppression, analyzes the characteristics of the ground clutter and
weather signals in the Doppler weather radars and simulates Doppler radar echo
signals (It includes ground clutter, weather echo signals and the mixture of them).
The simulated signals are used later to study the time and frequency domain ground
clutter suppression.
Secondly, this dissertation talks about the time domain filtering, gives the basic
theory of time domain filtering and describes the design method of the usually used
fifth-order elliptic infinite impulse response (IIR) ground clutter filter. In the time
domain, the work focuses on the regression filter. From the orthogonal polynomials
fit, this dissertation gives the basic theory of the regression filter for ground clutter
suppression and the filtering process using a regression filter. Through the study of
the computational complexity of regression
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Size: 842752 |
Author: 刘小洋 |
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Description: NMEA语句读取程序，实现了GPZDA\SDDBS\等解释- NMEALINEREAD currently supports the following NMEA sentences:
$GPGGA Global positioning system fixed data
$GPGLL Geographic poition [latitude, longitude & time]
$GPVTG Course over ground and ground speed
$GPZDA UTC date/time and local time zone offset
$SDDBS Echo sounder data
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Size: 2048 |
Author: doanything |
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Description: The word Radar is the acronym of Radio detection and ranging. Radar is an active instrument, which measures the echo of scattering objects, surfaces and volumes illuminated by an electromagnetic wave internally generated belonging to the microwave portion of the electromagnetic spectrum. It was born just before the second world war for detecting and
ranging target for non-civilian scopes. In this case the requested spatial resolution was not so challenging for the technology available that time. The opening of new technological frontiers in the fifties, including the satellites and the space vehicles, demanded a better
spatial resolution for application in geosciences remote sensing (RS). Synthetic aperture radar (SAR) technique was invented to overcome resolution restrictions encountered in
radar observations from space and generally to improve the spatial resolution of radar images.-The word Radar is the acronym of Radio detection and ranging. Radar is an active instrument, which measures the echo of scattering objects, surfaces and volumes illuminated by an electromagnetic wave internally generated belonging to the microwave portion of the electromagnetic spectrum. It was born just before the second world war for detecting and
ranging target for non-civilian scopes. In this case the requested spatial resolution was not so challenging for the technology available that time. The opening of new technological frontiers in the fifties, including the satellites and the space vehicles, demanded a better
spatial resolution for application in geosciences remote sensing (RS). Synthetic aperture
radar (SAR) technique was invented to overcome resolution restrictions encountered inradar observations from space and generally to improve the spatial resolution of radar images.
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Size: 796672 |
Author: 可难 |
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Description: 这是barker码的产生程序。这用于地面目标回波检测试用。-This is a code generator barker. This is used for ground targets echo detection trial.
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Size: 6144 |
Author: Sang |
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